JSEL2.0支持嵌套访问，也就是dot操作符来访问变量里的属性例子

如何进行变量的访问支持嵌套访问，也就是dot操作符来访问变量里的属性，假设我们有一个Foo类：
定义foo类

public class foo {
    private int age;
    private int sexy;
    private String brithday;
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getBrithday() {
        return brithday;
    }
    public void setBrithday(String brithday) {
        this.brithday = brithday;
    }
    public int getSexy() {
        return sexy;
    }
    public void setSexy(int sexy) {
        this.sexy = sexy;
    }
  
}
定义调用方法  

public void testClass() {
        Expression el = factory.create(" foo.age + 2 * foo.sexy + obj.testAdd(1,2)");
        foo f= new foo();
        f.setAge(15);
        f.setSexy(2);
        HashMap<String, Object> context = new HashMap<String, Object>();
        context.put("foo", f);
        context.put("obj", this);
        Object result22 = el.evaluate(context);
        System.out.println("result22:"+result22);
    }

    public static void main(String[] args) {
        JSELTest test = new JSELTest();
        test.testClass();
    }

运行结果：
result22:22